Amazon Linux 2023 Security Advisory: ALAS2023-2026-3159
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
Severity:
Important
Issue Overview:
A flaw was found in hpack, an HTTP/2 Header Encoding for Python. Unbounded variable integer decoding can lead to excessive computation when processing specially crafted, malformed input. A remote attacker could exploit this vulnerability to cause a denial of service by effectively blocking further processing within the affected component. (CVE-2026-59980)
Affected Packages:
python-hpack
Issue Correction:
Run dnf update python-hpack --releasever 2023.12.20261012 or dnf update --advisory ALAS2023-2026-3159 --releasever 2023.12.20261012 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
noarch:
python3-hpack-4.0.0-2.amzn2023.0.3.noarch
src:
python-hpack-4.0.0-2.amzn2023.0.3.src